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29 Cards in this Set
- Front
- Back
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Volcanologist
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A scientist who studies volcanoes
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Vent
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The opening of the volcano where lava erupts
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Magma
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Underground liquid rock
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Date that Mount St. Helens erupted
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May 18 1980
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Ahah is light or dark?
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Dark
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An avalanche of volcanic material is called
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Pyroclastic Flow
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How fast can pyroclastic flows move?
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80 miles per hour
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How many zones are active
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3
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What are the four elements in combination lava
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iron, silicon, magnesium, and alluminum
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What is the temerature of pyroclastic flow
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704 degrees C
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Pummis can form from this type of lava
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Gases present
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Type of volcanoes in the Hawaiian Islands
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Sheild
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What 2 factors are important in an eruption
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temperature and water
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Lava
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Hot liquid rock which has reached the Earth's surface
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Volcano
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The place in the Earths surface thru which magma and other materials reach
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Volcanic dust
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The smallest particles blown in the air from the volcano
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Volcanic ash
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A particle blown in the air from the volcanic which is the size of a rice grain
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Volcanic bombs
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The largest type of particle blown in the air from the volcano
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Cinders
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Small volcanic bombs the size of golf balls
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Cinder Cones
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One type of volcano which form explosive eruptions which are made up mostly of cinders.
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Shield Volcanoes
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Composed of quiet lava flows
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Composite Volcanoes
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Built up of alternating layers of rock particles
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Crater
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The funnel shaped pit at the top of the volcanic cone
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Caldera
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A large pit formed when a top of a volcano collapses or explodes
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The Ring of Fire
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Extends around the Pacific Ocean
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The Mediterranean Zone
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Extends around the Medeterranean Sea
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What is the most dangerous volcano in the US?
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Mount Rainier
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The Mid Atlantic Ridge
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Extends down the middle of the Atlantic Ocean and through Iceland
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Why is Mount Rainier so dangerous?
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Because of constantley shifting tectonic plates, which one might squeeze down into the mantle where it becomes trapped with hot magma, and if the pressure becomes too great, it will explode
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